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Finding the Fourth Proportional to 259,289.53, 388,999.91 and 72,301.03

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Solution

The fourth proportional to 259,289.53, 388,999.91 and 72,301.03 is: 108,469.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,289.53 : 388,999.91 = 72,301.03 : x
  2. Step 2: Convert to fraction form
    259,289.53/388,999.91 = 72,301.03/x
  3. Step 3: Cross multiply
    259,289.53x = 388,999.91 × 72,301.03
  4. Step 4: Simplify right side
    259,289.53x = 28,125,094,558.78
  5. Step 5: Solve for x
    x = 28,125,094,558.78/259,289.53
  6. Step 6: Final answer
    x = 108,469.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.